CN104734331A - Voltage sampling circuit for double-power-source change-over switch electric appliance - Google Patents
Voltage sampling circuit for double-power-source change-over switch electric appliance Download PDFInfo
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- CN104734331A CN104734331A CN201510156940.4A CN201510156940A CN104734331A CN 104734331 A CN104734331 A CN 104734331A CN 201510156940 A CN201510156940 A CN 201510156940A CN 104734331 A CN104734331 A CN 104734331A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The invention discloses a voltage sampling circuit for a double-power-source change-over switch electric appliance. The voltage sampling circuit comprises the following circuit modules of a capacitance step-down circuit module, a rectifying circuit module, a photoelectric isolation circuit module and a signal shaping processing module which are sequentially connected in series. The capacitance step-down circuit module and a power frequency alternating current power source conduct step-down processing. The rectifying circuit module conducts full-wave rectification and filtering on output low-voltage alternating current signals of the capacitance step-down circuit module, the photoelectric isolation circuit module conducts security isolation on output signals of the rectifying circuit module and a follow-up signal processing circuit, and the signal shaping processing module adjusts output isolation signals of the photoelectric isolation circuit module. The capacitance step-down circuit module replaces a transformer, the space occupied by the voltage sampling circuit is greatly reduced, electromagnetic radiation is avoided, the whole circuit and EMC characteristic are better, the capacitance step-down circuit module is better in economical efficiency, saves energy and is environmentally friendly, and the voltage sampling circuit is suitable for voltage sampling of the double-power-source change-over switch electric appliance.
Description
Technical field
The present invention relates to dual-power transfer switch appliance field, particularly a kind of electronic control circuit of dual-power transfer switch electrical equipment.
Background technology
The important events of some low-voltage distributions, for reducing the economic loss caused because of power failure, adopt two road Power supplies: conventional, for subsequent use or for subsequent use each other, this two roads power supply can be all mains supply, and Ye Ke mono-tunnel is mains supply, and a road is that diesel engine generator is powered.When a road power supply in power supply process because of fault can not normal power supply time, its load is called dual-power transfer switch electrical equipment by the device switching to another road power supply, be called for short TSE, the device that its load is automatically handed over another road power supply is called automatic transfer switching electric appliance, is called for short ATSE.
At present, ATSE is generally made up of automatic change-over body and control circuit two parts, is mainly used in the important place not allowing to have a power failure.When ATSE detects that the deviation exceeding permission appears in the current power supply voltage of load or frequency, ATSE automatically switches to another Power supply, guarantees that load supplying does not interrupt.Be provided with the circuit module of monitoring current power supply voltage in control circuit, generally as decompression device power-frequency voltage dropped in proportion by miniature transformer and compare lower security voltage and be input to control circuit voltage detecting end and carry out voltage monitoring.General two-way detecting voltage by three phase needs 6 miniature transformers, and miniature transformer is inductive load, because it exists volume greatly, takies the space that controller is larger, is unfavorable for that controller is miniaturized; But also there is the humorous wave height of miniature transformer, the defect such as electromagnetic radiation is high, cost is high, power consumption greatly, easily burns out.
Summary of the invention
There is above-mentioned defect for solving the existing voltage sample circuit for dual-power transfer switch electrical equipment, the invention provides the voltage sample circuit that a kind of reliability is high, volume is little, power consumption is little.
For achieving the above object, the scheme that the present invention takes is: a kind of voltage sample circuit for dual-power transfer switch electrical equipment, it is characterized in that: it comprises the following circuit module be sequentially connected in series: carry out the capacity voltage dropping circuit module of step-down process with power frequency AC, capacity voltage dropping circuit module is exported the rectification circuit module that low-voltage ac signal carries out full-wave rectification and filtering, and the output signal of rectification circuit module and follow-up signal treatment circuit carry out the photoelectric isolating circuit module of Secure isolation; And the output isolation signals of photoelectric isolating circuit module is carried out the signal shaping processing module adjusting process.Adopt capacity voltage dropping circuit module to replace transformer, the space shared by voltage sample circuit reduces greatly, avoids the generation of electromagnetic radiation, make whole circuit and EMC characteristic better, and capacity voltage dropping circuit module economics is better.
Further illustrating as such scheme, capacity voltage dropping circuit module is by can the non-polar condenser of resistance to power frequency high voltage and the discharge resistance in parallel with this non-polar condenser form; Capacity voltage dropping circuit module input is also connected to piezo-resistance.Piezo-resistance has anti-lightning strike or overvoltage protection effect, guarantees electric capacity reliably working, is not easy to be punctured by high-voltage pulse current.Preferably, CBB electric capacity or the safety electric capacity of non-polar condenser to be withstand voltage be 240V ~ 1000V, its capacity is 0.01uF ~ 0.2uF.
Matchingly, discharge resistance is 330k Ω ~ 1000 k Ω.
Described rectification circuit module comprises integrated full-wave rectification bridge, and is located at the filter capacitor of full-wave rectification bridge output.The relative halfwave rectifier of form rectification circuit, can reduce the capacity of non-polar condenser.
Photoelectric isolating circuit module comprises precision photoelectric coupler, and the input of precision photoelectric coupler is connected with full-wave rectification bridge output by current-limiting resistance, and the C pole of precision photoelectric coupler output is connect by pull-up resistor and is connected with DC power supply.
Preferably, precision photoelectric coupler model is PC817.Precision photoelectric coupler had both played the effect of Phototube Coupling, linearly signal can be carried out linear tradition again, simplified subsequent conditioning circuit.
Signal shaping processing module comprise band Schmidt trigger inverter, the input of inverter is connected with the e pole of precision photoelectric coupler output, between the input of inverter and the negative pole of DC power supply filter capacitor and potentiometer; The output of inverter is serially connected with diode.The logic pulse signal that the exportable waveform of inverter is more level and smooth, the signal of adjacent phase can be isolated by diode.
Preferably, the integrated circuit of inverter to be model be 74LS14 or model are the CMOS integrated circuit of 40106.
Signal shaping processing module output is connected with logic processing circuit module.Logic processing circuit module can produce the signal controlling the action of dual-power transfer switch electrical equipment.
The use of capacity voltage dropping circuit module, because electric capacity is capacitive load, its power factor is close to 1, and its not consumed power in theory, power consumption becomes very low, and harmonic wave is little.CBB electric capacity or safety electric capacity cheap, security performance is high.Non-polar condenser be main devices composition capacity voltage dropping circuit, output be current signal.
Its principle of capacity voltage dropping circuit is actually and utilizes capacitive reactance current limliting, is described below its Current calculation formula.Such as, receiving the alternating voltage of 220V/50Hz as control voltage, when capacitance C is 1uF, if the employing available electric current of full-wave rectification (mean value) is: I (AV)=0.89 × V/Zc=0.89 × 220 × 2 × ∏ × f × C=0.89 × 220 × 2 × 3.14 × 50 × C=60000C=60000 × 0.000001=0.06A=60mA.The capacity of choose reasonable non-polar condenser, circuit can normally work.
As from the foregoing, the present invention mainly contains following advantage: the simple science of circuit, takes up room little, and reliability is high, power consumption is little; Not only good economy performance, cost performance are high, and energy-conserving and environment-protective, are applicable to the voltage sampling of dual-power transfer switch electrical equipment.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Fig. 2 is the circuit theory diagrams of Fig. 1.
Main Reference label declaration: 1-capacity voltage dropping circuit module, 2-rectification circuit module 2,3-photoelectric isolating circuit module, 4-signal shaping processing module.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the present invention and Advantageous Effects thereof are further elaborated.
See Fig. 1 ~ Fig. 2, voltage sample circuit for dual-power transfer switch electrical equipment comprises the following circuit module be sequentially connected in series: carry out the capacity voltage dropping circuit module 1 of step-down process with power frequency AC, capacity voltage dropping circuit module 1 is exported the rectification circuit module 2 that low-voltage ac signal carries out full-wave rectification and filtering, the output signal of rectification circuit module 2 and follow-up signal treatment circuit carry out the photoelectric isolating circuit module 3 of Secure isolation; And the output isolation signals of photoelectric isolating circuit module 3 is carried out the signal shaping processing module 4 adjusting process.Wherein, capacity voltage dropping circuit module 1 is by forming by the non-polar condenser C1 of resistance to power frequency high voltage and the discharge resistance R1 in parallel with this non-polar condenser C1; Capacity voltage dropping circuit module 1 input is also connected to piezo-resistance Rt1.CBB electric capacity or the safety electric capacity of non-polar condenser C1 to be withstand voltage be 240V ~ 1000V, its capacity is 0.01uF ~ 0.2uF.Discharge resistance R1 is 330k Ω ~ 1000 k Ω.Rectification circuit module 2 comprises integrated full-wave rectification bridge DG1, and is located at the filter capacitor C2 of full-wave rectification bridge DG1 output.
In addition, photoelectric isolating circuit module 3 comprises precision photoelectric coupler U1, the input of precision photoelectric coupler U1 is connected with full-wave rectification bridge DG1 output by current-limiting resistance R2, and the C pole of precision photoelectric coupler U1 output is connect by pull-up resistor R3 and is connected with DC power supply.Precision photoelectric coupler U1 model is PC817.
Signal shaping processing module 4 comprises the inverter U11 of band Schmidt trigger, the input of inverter U11 is connected with the e pole of precision photoelectric coupler U1 output, between the input of inverter U11 and the negative pole of DC power supply filter capacitor C3 and potentiometer TR1; The output of inverter U11 is serially connected with diode D1.The integrated circuit of inverter U11 to be model be 74LS14 or model are the CMOS integrated circuit of 40106.Signal shaping processing module 4 output is connected with logic processing circuit module.
Book and specific embodiment do not form any restriction to the present invention according to the above description; the present invention is not limited to embodiment disclosed and described above; to amendments more of the present invention and distortion, also should fall in the protection range of claim of the present invention.
Claims (10)
1. the voltage sample circuit for dual-power transfer switch electrical equipment, it is characterized in that: it comprises the following circuit module be sequentially connected in series: carry out the capacity voltage dropping circuit module of step-down process with power frequency AC, capacity voltage dropping circuit module is exported the rectification circuit module that low-voltage ac signal carries out full-wave rectification and filtering, and the output signal of rectification circuit module and follow-up signal treatment circuit carry out the photoelectric isolating circuit module of Secure isolation; And the output isolation signals of photoelectric isolating circuit module is carried out the signal shaping processing module adjusting process.
2. as claimed in claim 1 for the voltage sample circuit of dual-power transfer switch electrical equipment, it is characterized in that: described capacity voltage dropping circuit module is by can the non-polar condenser of resistance to power frequency high voltage and the discharge resistance in parallel with this non-polar condenser form; Capacity voltage dropping circuit module input is also connected to piezo-resistance.
3. as claimed in claim 2 for the voltage sample circuit of dual-power transfer switch electrical equipment, it is characterized in that: CBB electric capacity or the safety electric capacity of described non-polar condenser to be withstand voltage be 240V ~ 1000V, its capacity is 0.01uF ~ 0.2uF.
4., as claimed in claim 3 for the voltage sample circuit of dual-power transfer switch electrical equipment, it is characterized in that: described discharge resistance is 330k Ω ~ 1000 k Ω.
5., as claimed in claim 4 for the voltage sample circuit of dual-power transfer switch electrical equipment, it is characterized in that: described rectification circuit module comprises integrated full-wave rectification bridge, and is located at the filter capacitor of full-wave rectification bridge output.
6. the voltage sample circuit for dual-power transfer switch electrical equipment as described in any one of claim 1 ~ 5, it is characterized in that: described photoelectric isolating circuit module comprises precision photoelectric coupler, the input of precision photoelectric coupler is connected with full-wave rectification bridge output by current-limiting resistance, and the C pole of precision photoelectric coupler output is connect by pull-up resistor and is connected with DC power supply.
7., as claimed in claim 6 for the voltage sample circuit of dual-power transfer switch electrical equipment, it is characterized in that: described precision photoelectric coupler model is PC817.
8. as claimed in claim 7 for the voltage sample circuit of dual-power transfer switch electrical equipment, it is characterized in that: described signal shaping processing module comprises the inverter of band Schmidt trigger, the input of inverter is connected with the e pole of precision photoelectric coupler output, between the input of inverter and the negative pole of DC power supply filter capacitor and potentiometer; The output of inverter is serially connected with diode.
9. as claimed in claim 8 for the voltage sample circuit of dual-power transfer switch electrical equipment, it is characterized in that: the integrated circuit of described inverter to be model be 74LS14 or model are the CMOS integrated circuit of 40106.
10. duplicate supply as claimed in claim 1, is characterized in that:: described signal shaping processing module output is connected with logic processing circuit module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156940.4A CN104734331B (en) | 2015-04-04 | 2015-04-04 | A kind of voltage sample circuit for dual-power transfer switch electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510156940.4A CN104734331B (en) | 2015-04-04 | 2015-04-04 | A kind of voltage sample circuit for dual-power transfer switch electrical equipment |
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| CN104734331A true CN104734331A (en) | 2015-06-24 |
| CN104734331B CN104734331B (en) | 2017-08-15 |
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| CN201510156940.4A Expired - Fee Related CN104734331B (en) | 2015-04-04 | 2015-04-04 | A kind of voltage sample circuit for dual-power transfer switch electrical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10404184B1 (en) | 2018-08-08 | 2019-09-03 | Wistron Corporation | Relay adaptive to alternative current and direct current input signals |
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| CN103457349A (en) * | 2013-07-25 | 2013-12-18 | 德力西电气有限公司 | Double-power-source switching control circuit based on single-chip microcomputer |
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| CN103969498A (en) * | 2014-05-30 | 2014-08-06 | 江苏容天机电科技有限公司 | High-power high-frequency power supply output overvoltage detection circuit |
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2015
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Patent Citations (12)
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| EP0398722A2 (en) * | 1989-05-18 | 1990-11-22 | Hirotami Nakano | Uninterruptable power supply apparatus and isolating method thereof |
| CN2270984Y (en) * | 1996-04-11 | 1997-12-17 | 哈尔滨工业大学 | Electric servo manipulator |
| CN101162850A (en) * | 2007-09-20 | 2008-04-16 | 浙江中凯电器有限公司 | Control device of duplicate supply attent-unattent switch |
| CN201177241Y (en) * | 2008-03-11 | 2009-01-07 | 朱帮选 | Semiconductor environment-friendly energy conserving lamp |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10404184B1 (en) | 2018-08-08 | 2019-09-03 | Wistron Corporation | Relay adaptive to alternative current and direct current input signals |
| CN110828237A (en) * | 2018-08-08 | 2020-02-21 | 纬创资通股份有限公司 | Relay suitable for AC and DC input signal |
| TWI731255B (en) * | 2018-08-08 | 2021-06-21 | 緯創資通股份有限公司 | Relay adaptive to alternative current and direct current input signals |
| CN110828237B (en) * | 2018-08-08 | 2021-12-14 | 纬创资通股份有限公司 | Relay suitable for AC and DC input signal |
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| CN104734331B (en) | 2017-08-15 |
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Effective date of registration: 20160812 Address after: 528000 Jiangwan Road, Guangdong, No. 18, No. Applicant after: Foshan Science &. Technology College Address before: 528000, two, 920, five, 1, 3, six, Jihua Road, Chancheng District, Guangdong, Foshan Applicant before: Foshan Lan Tu Science and Technology Ltd. |
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